Cameron NUFLO 1141C, User Manual

Page: 51 / 120

Chapter 3: Main Circuit Board Wiring
51
Auxiliary Serial Ports
The auxiliary serial ports (Resources A02 and A21) can be software-configured to support either RS-485,
RS-232C communications, as shown in the ScanWin screen capture (Figure 3.23). Resources A02 and
A22 also support TTL communications, depending on which hardware options are installed. The
auxiliary RS-485 serial port switches (SW2 and SW6) are located along the left edge of the circuit board
with the other jumpers and switches, opposite the terminal blocks.
Figure 3.23—ScanWin Edit Details for Serial Port
For RS-485 communications , Resource A02 uses SW6 and terminals 14 and 15; resource A21
uses SW2 and terminals 46 and 47. If these terminals are not present, the RS-485 option is not
installed.
For RS-232 communications , Resource A02 uses SW 6 and terminals 9 through 12; resource
A21 uses SW 2 and terminals 41 through 44. If these terminals are not present, the RS-232 option
is not installed.
For TTL communications , Resource A02 uses connector CN33; resource A22 uses connector
CN29. If these connectors are not present, the TTL option is not installed.
These serial ports can be used with a modem, radios, or satellites for remote communication or peripheral
devices such as the NuFlo MVX
®
or MVX
®
-II multivariable transmitters, Daniel gas chromatographs
and ultrasonic meters to provide additional inputs via serial ports. (For more information, refer to
ScanWin manual,
Chapter 7: About the System ).
Either auxiliary serial port can be configured as a second console port for remote console, a network port,
or slave ports for connection to Modbus devices or other peripheral devices. (For more information, refer
to ScanWin manual,
Chapter 7: About the System ).